Gas producer



F. H. TREAT GAS PRODUCER Oct. 6, 1931.

Filed Nov. 12, 1926 INVENTOR Patented Oct. 6, 1931 UNITED STATES PATENT OFFICE FRANCIS H. TREAT, OF BELLEVUE, OHIO, ASSIGNOB- TO DUFF PATENTS COMPANY, INC.,

OF PITTSBURGH, PENNSYLVANIA, A CORPORATIQN OF PENNSYLVANIA GAS PRODUCER.

Application filed November 12, 1926. Serial No. 147,945.

This invention relates to gas producers, and more particularly to producers of the mechanical type.

This invention relates primarily to producers of the mechanical type wherein the body part of the producer is stationary and wherein mechanical feeding and agitating means is provided at the top thereof, and wherein ash removing means is provided at the bottom thereof.

According to the present invention it is proposed to provide an ash removing means for producers'of this type wherein the ashes will be most eflectively removed and discharged at a given point at one side of the producer and wherein an effective water-seal is provided for the ash receiving pan.

The invention may be readily understood by reference to the accompanying drawings,

in which Figure 1 represents a vertical section through a producer embodying the present invention;

Figure 2 is a plan view of a portion of the ash pan, showing the scraper for removing ashes from the pan; and

Figure 3 is a detail view in vertical section, showing the water outlet passage through the cone-like member.

In the drawings, 2 designate-s the body of the gas producer. At thetop of the producer is a fuel feeding top 3, which may be of any known or preferredconstruction, and which preferably is constructed in accordance with the invention disclosed in my copending application, Serial No. 147,944, filed November 12, 1926.

Associated with the fuel feeding top is an agitator 4. In the lower part of the producer in the fuel bed thereof are tuyeres 5 which are preferably of the construction shown in my copending application, Serial No. 7 53,433, tiled December 2, 1924. Depending from the lower end of the producer is an inwardly sloping apron 6.

Rotatably supported at the bottom of the producer on a base 7 is an ash pan 8 which has outwardly sloping sides 9. At the center of the ash pan is an inwardly sloped annular 50 flange 10 having an inverted cone-like casting 11 thereon, this casting having radial ribs or fins 11 on its surface. The casting 11 is held in spaced relation to the flange 10 by means of bosses 11 at its lower edge. This permits of the flow of wateribetween the cone and the I inwardly sloping flange 10, as hereinafter more fully described.

Mounted on the base 7 at suitable points are supporting rollers 12 which engage a bearing surface 13 on the under side of the pan. The under side of the pan is also provided with an annular rack 1 1 for engagement with a driving pinion 15 on the horizontal shaft 16 supported on the base 7. The

shaft 16 with its driving pinion 15 provides i means for efiecting the rotation of the ash pan, it being contemplated that a'motor or other suitable guiding means be connected to the shaft 16.

At the center of the ash pan is a vertical shaft 17 which provides the central post about which the pan rotates, and which is hollow. Located inside the inwardly sloping flange 10 is a horizontal plate 18 which is secured thereto and which has a central pipe 19 depending therefrom, the lower end 0; this pipe projecting into the hollow shaft 1 The arrangement is such that a normal wa ter level can be maintained in substantially the plane of line AA of Figure l. Water will be supplied to the ash pit in any suitable way, and the overflow can take place by the water flowing between the upper part of the inwardly sloping flange 10 and the under is of particular advantage in that it provides an effective seal at the base of the cone 11 and yet permits of the central removal of the water. Since the water is removed from the center of the pan, there are no pipes to interfere with the operation of the scrapers,

rotated.

as hereinafter described, and the overflow is not likely to become clogged with ashes.

Secured to the apron 6 on the stationary body of the producer is a plow member 20. If desirable, a plurality of these plows may be provided. The plows are preferably formed of a piece of angle iron, and they project down into the ash pan close to the bot tom thereof and well below the lowermost edge of the apron 6.

Carried on a fixed bracket 22, projecting laterally from the base of the producer near the top of the apron 6 or otherwise suitably supported, is a scraper 23. This scraper extends down into the ash pan close to the sloping sides 9 thereof and is inclined in a direc' tion opposite the direction of rotation of the pan. This scraper, which is preferably formed of angle iron, has a beveled lower end adapted to ride on the bottom of the pan. If necessary more than one scraper may be provided.

In the operation of the producer the ash pan may be continuously or intermittently The bed of fuel in the producer will be stationary, while the ashes immediately above the cone 11 are carried around with the rotation of the pan. The ashes tend to seek a natural angle of repose in the ash pan, but since they are carried around with the rotation of the pan, the plows 20 tend to disturb them and force them outwardly so that other ashes descending from the producer will replace them. Thus, ashes which have been forced to the outside of the pan are carried around with the rotation of the pan until their travel is obstructed by the inclined scraper 28. The ashes are forced to ride up this scraper and to be discharged over the edge of the pan. The agitation produced by the revolving center cone 11 will overcome the tendency of the ashes to pack below the tuyeres, and this loosening of the ashes is stimulated by the ashes which move around with the pan, rubbing against and coming in contact with the stationary 'ashes above them in the producer. An effective means for securing the removal of the ashes is thus secured.

An important advantage of the invention resides from the provision of a rotatable ash pan at the base of a stationary producer, together with the provision of the plows and scrapers for effecting the loosening and removal of the ashes.

A further advantage resides from the provision of the central cone 11. while the arrangement is considerably simplified by the provision of the central overflow for the water in the ash pit.

The construction, furthermore, is one which canhe built at relatively low expense.

lVhile I have described a preferred embodiment of my invention, it will be understood that various changes and modifications may be made therein, and that the invention may be otherwise embodied and employed in connection with producers of a type other than the particular type illustrated.

I claim:

1. A gas producer comprising a body, an ash pan at the lower end of the body, means for rotating the ash pan, said ash pan having an outer outwardly sloped wall spaced away from the lower end of the body and extending up around the lower end of the body and having a concentric inwardly sloped wall of less height than the outer wall, an inverted cone-like member supported on the inner wall, water-circulating conduits being provided between said cone-like member an d said inner wall to cause the water to flow under the cone, and water discharge means within said. inner vall.

2. In a mechanical gas producer of the type having a stationary body adapted to receive the fuel bed and a rotatable ash pan with the lower end of the body projected into the pan, blast tuyercs extending radially into the producer from the side walls thereof only part way to the center of the fuel bed and in a plane above the level of the ash pan, said tuyeres being adapted to project into the fuel bed and restrain it against rotation with the ash pan and constituting the only source of air supply to the producer, and a central cone-like member supported by the ash pan, the top of the cone-like member terminating below the plane of the tuyeres.

3. In a mechanical gas producer of the type having a stationary body adapted to receive the fuel bed and a rotatable ash pan with the lower end of the body projected into the pan, blast tnyeres extending radially into the producer from the side walls thereof only part way to the center of the fuel bed and in a plane above the level of the ash pan, said tuyeres being adapted to project into the fuel bed and restrain it against rotation with the ash pan and constituting the only source of air supply to the producer, a central conelil e member supported by the ash pan. the top of the cone-lil e member terminating below the plane of the tnycrcs, a plow member on. the lower end of the body projecting into the ash pan for loosening the ashes around the base of the central cone and forcing them toward the outside of said pan, and a fixed scraper projecting into the pan along the outer edge thereof and inclined toward the direction of travel of the pan for removing ashes from the pan.

4. A producer comprising a relatively rotatable concentric body adapted to contain a solid fuel bed. an ash pan, said ash pan having a central inverted cone-shaped member extending up into the body for supporting most of the fuel and ashes within the body, and means for causing: water within the ash pan to overflow directly under said n: no

cone-shaped member at a predetermined level, and means other than said cone-shaped member for exclusively supplying the fuel bed in said body With air.

In testimony whereof I have hereunto set my hand.

FRANCIS H. TREAT. 

